211065797 has 4 divisors (see below), whose sum is σ = 216770316. Its totient is φ = 205361280.

The previous prime is 211065781. The next prime is 211065839. The reversal of 211065797 is 797560112.

211065797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 200477281 + 10588516 = 14159^2 + 3254^2 .

It is a cyclic number.

It is not a de Polignac number, because 211065797 - 2⁴ = 211065781 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211065797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211065707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2852204 + ... + 2852277.

It is an arithmetic number, because the mean of its divisors is an integer number (54192579).

Almost surely, 2^211065797 is an apocalyptic number.

It is an amenable number.

211065797 is a deficient number, since it is larger than the sum of its proper divisors (5704519).

211065797 is an equidigital number, since it uses as much as digits as its factorization.

211065797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5704518.

The product of its (nonzero) digits is 26460, while the sum is 38.

The square root of 211065797 is about 14528.1036959405. The cubic root of 211065797 is about 595.3960567202.

The spelling of 211065797 in words is "two hundred eleven million, sixty-five thousand, seven hundred ninety-seven".